body{
    margin: 0;
    padding: 0;
    width:98%;
}
article{
    width: 62%;
    margin: 30px auto;
    height: 900px;
}
header{
    width: 100%;
    height: 50px;
    line-height: 50px;
    font-size: 32px;
    text-align: center;
    font-family: '宋体';
    font-weight:600;
    /*border-bottom: 1px solid #999999;*/
}
hr{
    height: 1px;
    color: #999999
}
section{
    width: 100%;
}
.mess{
    margin: 25px auto;
    padding-bottom: 15px;
    width:100%;
    text-align: center;
    color: #666;
    border-bottom: 1px solid #999999;
}
.mess span:first-child{
    margin-right:25px;
}
.mess span:last-child{
    margin-left: 25px;
}
img#back{
    width: 30px;
    margin-top: 0px; 
    margin-left:25px;
    float: left;
}
footer{
    width: 100%;
    border-top: 1px solid #999999;
    padding-top: 15px;
}
.tip{
    display: inline-block;
    border: 2px solid  #06aeff;
    border-radius:10px;
    padding:3px 8px;
    margin:0 5px;
    font-size:14px; 
    color:#008bce;
    background: white;
    font-weight: 500;
    float: left;
}
.tip:hover{
    color:white;
    background: #06aeff;
}